Improvement in steam-generators



' Improvements the whole may answer as a means.

, DEXTER AMSDELL, OF HAMBURG, NEW YORK.

Letters Patent No. 103,120, datedllfay 17, 1870.

' imraovnmnnr m cream-GENERATORS.

The Schedule referred to in these Letters Patent and making part of the same.

, I, DEXTEaAMsDELQ of Hamburg,,in ithe county of Erie and State of New York, have made certain which the following'is a specification.

[The nature of my invention consists in constructing steam-generators of a series of sections, made of castiron or other suitable material peculiarly arranged and provided,gthe lowerrow of sections being constructed in conjunction with perforated plates'or gratebarsfitting between the series of sections, to be used as fire-grates, the lower rowof sections answering as I grate and generator at the same time. a This arrangement is adapted for the burning of fuel, such as sawdust, tan-bark, 8m, and, in order to supply. the combustible gases obtained, in burning sawdust, 800., with the necessary amount of air, each of the sections of the lowerrow, which constitutes the grate, is'provided through. its center with a hotair-snpply tube, in order to convey a direct stream of hot air right into the combustible gases trying-to escape without being consumed. I refer to thedrawiug which makes part ofthe following specification and'illustrates my inventionmore fully. l

" Figure 1 represents aseries of sections, A, secured together by a bolt running through the center, thespace between the sectionsA being filled with perforated plates B, and each of the sections A being provided with an air-supply pipe or tube, G, in order that gratev to burn sawdust and such :like material. m

Figure 2 represents the steam-generator, composed of series of sections A, secured to ethe'r with bolts.

running through their center, or y other suitable A are thecast sections B is the grate, as aforesaid;

Care the hot-air-supply tubes; and Disthe steam-receiver. It will be observed that the capacity of the steamgenerator depends. upon the number of sections apin Sectional stea e plied; that any number desired may be applied and secured together; and that the whole generator is to I extended in all directions, and to provide for a coinmunieation from one to the other sections throughout the whole generator. 1 I 1 Figure a is'a cut through the center of section A, where the same terminates in branches. It is pro-. vided with an expansion ring, A',to give ready means for making tight joints iii-securing sections together, and to prevent leakages, caused by expansion and contraction. i It will be observed that the branches of section A are bored out, and the expansion ring turned 05', in order to fit the bore of section branch A to perfectness; and that the expansion-packing ring, when two sections are screwed together, fits one-half in the branch of one, andone-half in the'branch of the other section, the expansion-packing ring, in conjunction with a branch of section A, operating like a tube or a spy-glass. With the hot-air-supply tube 0, only those sections A are provided which are serving, in combination with perforated plates or grate-bars B, as firegrate.

-Having thus fully described my invention, I desire to secure by Letters Patent 1. In the construction of sectional steamenerae tors, the application of sections A, so arranged and constructed as toserve as fire-grates, substantially as described and set forth.

2. In combination with sections A,-the air-supply tubes 0, for the purpose set forth.

' D. AMSDELL.

. Witnessesi H. WM. DoPP, MICHAEL J (STARK.

It terminates in branches,- to enable other sections to be added and 

